diff --git a/modules/nixos/graphical/default.nix b/modules/nixos/graphical/default.nix
index 67f2cf3..018dd77 100644
--- a/modules/nixos/graphical/default.nix
+++ b/modules/nixos/graphical/default.nix
@@ -32,6 +32,10 @@
       type = lib.types.str;
       description = "Command to use for adjusting brightness";
     };
+    calculatorCommand = lib.mkOption {
+      type = lib.types.str;
+      description = "Command to use for quick calculations";
+    };
     toggleBarCommand = lib.mkOption {
       type = lib.types.str;
       description = "Command to hide and show the status bar.";
diff --git a/modules/nixos/graphical/i3.nix b/modules/nixos/graphical/i3.nix
index 9956adf..d4b73ed 100644
--- a/modules/nixos/graphical/i3.nix
+++ b/modules/nixos/graphical/i3.nix
@@ -123,6 +123,8 @@ in {
               "exec --no-startup-id ${config.powerCommand}";
             "${modifier}+Shift+m" =
               "exec --no-startup-id ${config.brightnessCommand}";
+            "${modifier}+c" =
+              "exec --no-startup-id ${config.calculatorCommand}";
             "${modifier}+Shift+c" = "reload";
             "${modifier}+Shift+r" = "restart";
             "${modifier}+Shift+q" = ''